Adding-machine.



C. A. LUNDGREN.

ADDING MACHINE. APBLIOATION FILED 0017.20, 1910.

Patented July 23; 1912.

4 SHEETS-SHEET 1 G. A. LUNDGREN. ADDING MACHINE.

APPLICATION IILED OOT.20, 1910.

Patented July 23, 1912.

4 SHEETS-SHEET 2.

0. A. LUNDGREN. ADDING MACHINE. APPLICATION FILED 0GT .20,1910.

Patented July 23, 1912.

4 SHEETS-SHEET 3.

G. A. LUNDGR ADDING MAG APPLICATION FILED o 1220,1910

' Patented July 23, 1912.

4 SHEET8SHBET 4.

"omit-En STAT Es PATENT oFr oE.

c ARLns A. LUNDGREN, or DETROIT, MICHIGAN," Assrenon 'ro nunnouons ADDING MACHINE COMPANY OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

AnmNe-MAcHruE.

S pecification of Iietters'Patent. Patented July 23, 1912.

, Application fil'edOetober20, 1910. Serial No. 588,039. I

Tocll whom it may concern:

:'--Be it known that L-Cnanms A. LUND- GREN, a citizen of the'United. States, residing at Detroit-,in the'county of Wayne and 'Stateof Michigan, have invented certain new and useful Improvements in Adding-- called repeat key and that it is custom- Y ary tofperform. multiplication by set-ting -Mach-ines, of which the following is' a speclfification.

repeat operations as performed for 'pur-- poses of multiplication and division. U

It will beunderstood that adding machines are commonly equipped .with a "soupon "the keyboard the multiplicand and operating such repeat key so as to prevent .the automatic release and restoration of amount keys which ordinarily takes'place at thezconclusion of an addi-ng operation,

the machine being then operated a number of times corresponding with a digit of the I .to keep count of the multiplier. In such use of the ordinary adding machine it is necessary for the user requisite number of repeat operations and have a discontinuance take place auto-maticallyg. Thus in the case of a motor driven machine the user can manipulate to set a controlling device at an indexed position denoting the requisite number of repeat operations and by said act not only render the the repeat mechanism caseof the operation of the familiar repeat 8 key, but also provide for continued effectiveness of such mechanism during that number of operations by touching use of familiar motor. equipped adding machines, the machine will be set in operationand caused to operate again and-again while the amount keys originally depressed remain depressed whereby the same amount is repeatedly tions equal the units of the multiplier digit whereupon the repeat mechanism "is .automatically released and restored to normal.

operations of the machute and this is apt to lead'to, mistakes 1 through a mis-count.

effective as in the.

of the machine. Then off the starting bar as in the added until the adding opera-- In the drawings which accompany and form part of this specification Figure 1 represents in right side elevation a sufficient .60 all parts being here .tional view of key-releasing-and' restoring devices of the machine; Fig. 2 is an enlarged elevation'showing some of the parts which similarly appear in Fig. 1 on a smaller scale;' Fig. '2 tion taken on the line 2 -9 of Fig. 2; Fig. 3 is a View quite similar to Fig. Qthough otherwise sectionalized and showing a changed relation'of parts resulting from'the settingof the repeat operation of the machine; Fig. .i is a fragmentary topflplan view of the machine.

Reference may be hadto Burroughs Patent No. 5%,963 of September 12, 1893, Pike Patent No. 615,895 of December 13,1898, Vincent Patent No. 866,750 of September 27, 1907 and Burd Patent No. 963,087 of October 5', 1909, for variousparticulars of the Burroughs machine as now familiarly:

known on the market.

The invention is preferably shown adapted to the electric drive'machine shown in said Vincent patent though it is not to be is. a detail cross sec-- devices and a partial understood as limited to use with a power driven machine In view, of the disclosure in said Vincent patent it will not be neces- ,sary here to describe'in detail thecomplete electric equipment, and, in .view of the disclosures in th's and other prior patents above mentioned it will not be necessary to extend the1description to the particulars of the machine. proper, familiar parts will be designated herein-. after in order to make clear the cooperation therewith of the added devices of the present invention.

The electric motor is designated by the numeral 87, and the clutch mechanism through which it drives the machine is designated in a general way by the numeral 36. The usualstarting bar located at the right of the amount keys is designated by the nu .meral 860 and it willbe understood that depression of this'startingbar efiects a,closing ofthe clutch in the manner described in said Vincent patent, such closing of the though" certain Y guided for normally held out of such clutch resulting in forward oscillation of the familiar full stroke sector 311 which as usual is secured to a short rock'shaft' 300.

The numeral 291 designates the usual depressible amount keys'which operate upon small bell cranks 217 to set-stop wires 270 for regulating the movement of the adding racks 610. Each row of bell cranks 217 has the usual detent slide 214 adapted to be thrust rearward upon depression of a key and detained by the detent pawl 228. The latter is as usual adapted to be released by the cross rod 202 of an oscillatory bail such cross rod also acting against 'thevend of the slide strip. The right hand side piece 219 of said bail carries the usual roller stud 262,

depress a key which 'inter poses an obstrucf tion in the path of the plate 622 so that its spring 618 is prevented from carrying the wiper piece 623 down past the roller stud 262 and hence there ensues no forward rocking of the bail rod 202 to release and restore the amount key stop devices. In the present instance an arm 218 loose upon the cross rod 200 is adapted to be swung upwardly intothe path of a stud a on the rocker plate 622 for the purposeof effecting this familiar result and this maybe accomplished by'depression of a repeat-key R, but-for the purposes of the present in vention said arm is also adapted to be moved to efi'ective'position by a slide bar A suitably ment'between the keyboard plates" 213 and 212. The said arm 218 has a portion ex tending considerably-forward of the cross rod 200 and is notched at'b adjacent said rod, the said slide bar having a depending lug with a roller stud a normally occupying forward and. backward movesaid notch. Theslideis normally rearwardand when moved forward said roller stud. acts with a camming effect upon the for--' ward side of the notch thereby rocking the arm 218 to eflective position said arm being position .by a spring 218 connecting its forward extremity to auportion of the framework. The

forward portion of the arm 218 is suffitive position,

'slidebar as 'ciently elon justments oi the-arm will atedto provide for varying ade the slide bar in each of which be held displaced or in citesthe purpose being to provide for as many different adjustments of said units of a multiplier digit might require. This would mean eight different positions of the slide bar in each of which cover plate A.

inal position before it should holdthe arm 218 in tion. The upper edge of the bar A for a effective posidistance at its forward port-ion is' notched or ratcheted to provide a series of shouldersa by which to advance the bar varying distances, and for indexing purposes the several inclined surfaces adjacent said shoulders are inscribed with numerals from 2 to 9 as illustrated in Fig. 4. A guide plate A is mounted upon the keyboard plate 213 and is constructed to accommodate the slide bar A and apertured to'nor'mally expose all of saidnumerals as illustrated iii Fig. 4. This cover plate has a slotted rear portion in which is mounted a finger piece A for setting the bar A. The latter is normally held rearward by a spring A and the finger piece is adapted to be engaged with any one of the, shoulders a and drawn a forward to advance the slide bar against the stress of the latters spring. To provide for the proper manipulation of the fin er piece it is provided at its rear end with pivot pins a engaging under" flanges of the I cover plate Aand slid able below the same so that the finger piece may have both a pivotal movement up and down 'and sliding movement forward andback. It is limited as to pivotalamovement extending between ears of the cover plate The finger piece, has at its forward endwhich to grasp it and below and a little forward of this up:

standing portion the finger by a cross piece a A; an upstanding portion a by piece is formed as a pawl or .dog a for engaging the shoulders a Normallythis pawl or dog rests upon'the rear portion of the inclined surface of the slide bar A. in rear of the rearmost, shoulder a ,.as illustrated Fig. 2. The finger piece may be lifted and drawn forward for engage'mentwith any one of the. saidfishoulders a and. then engaged therewith and drawn farther forward to carry with itthe slide bar A, the movement being'limited by abutmentoflthe dog 'or pawl against a shoulder a of the cover plate A which shoulder defines the forward end of the aperture through which the multiplier numerals on the. slide bar show. The finger piece is connected by a strap or ribbon A ith. a spring A Fig. 1, for returning it to and holding it in normal position. When it hasbeen operated to set the slide A it'is released and said spring will bring it back, its rearward movement being "limited by abutment .of a vertical shoulder a against the end of theslot in the The .slide bar A has an incline o back of the notched or ratcheted pgrtion in its upper edge so that when said slide bar thereafter returns to normal thepawl' or dog a? may be brought to the nordefined. F v

The slide-bar A is returned. to. normal step by-step in successive op'erations of the ma- I chine and in this manner the number-biremember D f to'a part of the machine frame.

peat-operations is automatically controlled or determined according to the extent to,

which the bar has been advanced through. the use of the finger piece A" after the manner above described. To this end the underside of thebar is notched-or-ratcheted to provide an escapement rack A, and a pallet is provided for engaging with said-rack. One member of said pallet is in the form of a detent D pivoted upon a cross'rod 201 and normally engaged with the rack A by' a spring (Z which connects it with the other being-also pivoted upon the cross rod 201 and having alaterally projecting stud doverlying the member D. "It also has a depending arm D connected by a spring D Said depending arm D has a roller stud d normally engaged by a finger d of the rocker plate 622 as illustrated in Fig. 2 so that the pallet member-D is normally held disengaged from the-rack A as shown in Fig.2.

When the slide bar A is moved forward'one or more of the teethofthe rack will be carried forward over the member D which will operate as a detent to temporarily detain the slide bar A against the stress of the spring A? so that the arm 218 will be held at effective position to obstruct the rocker plate 622. The limited movement which-the latter has under such circumstances is suflicient how- .ever to operate the escapement device, the finger d retreating far enough to permit the .to swing the escapement member D- in the path of the shoulder of the rack A, and withdraw the member D from engagement with the rack asillustrated in Fig.

8. Thereafter when the rocker plate is returned to normal by the full stroke sector 3111the escapement pallet is rocked the other way .to disengage the member D from the rack and renga-ge the member D with the rack. It will be obvious that this provides for a step by step return of vthe'slide bar'A which willfinally bring its roller stud a" 1 back to the notch b and "permit the spring 218. to restore the'arm 218'to'normal so that inthe ensuing operation of the machine the amount-stop devices will be released and the the above described 'me'chanisnrprovi'des a' ready means for auto- .ina't-ically determining the number of opera:

" tions to be performed when repeated addition is desired forthepurposespf multiplication, the user being relieved all together of "1 the work of mentally keeping-track of the number of times tl'ie machine is operated.

It is desirablewith .a motor d'riVenma F chine to also relieve theuser of the necessity of holding down the startingbar during the successive operations, and the present inven- 7 tion provides for detaining that under of the pallet, said other member 'controlof the above described repeat devices. To this end the lever-361 which forms part of the familiar starting mechanism "has a stud e which normally enga es a cam ,su rface ef below a notch e infa etent slide bar -E guided upon the cross rod or shaft 200 by a spring a". When the starting member is depressed andthe lever 361 rocked the stud e is forced up past the" cam edge and becomes seated in the notch 6 so that the starting connections are held in operative has a ried by the side bar 219 of the key releasing and restoring bail. Therefore whenever that tion the detent bar will be thrust forward so as to release the starting connections. In the case of an operation which is .to be repeated the bail does not swing forward consequently said connections remain set, but with the last of a series of repeat operations the bail isoperated and consequently the starting connections will be released. 2

' It has been before stated that provision is made for the ordinary repeatadjustments by depression of a key. In the present instance that key, designated R,.has a lug .r engaging over a stud r on the forward extension of he arm and upheld by a spring g.

It is customary to provide for rocking the key releasing and restoring bail whenever desired to correct errors and' there is here shown a key 0 such ascommonly employeddiiferently than usual. 'Its stem G isbifurcated to embrace a stud upon an. upwardly projecting extension of thebail, the key being located at the rear of the keyboard 1nmeans for releaslng the amount-determining ling-.devicsj adapted to automatically re-L l 'enable'saidi'eleasing means in .a predetermined number of successive. operations .of the prime. mover. 2. In a machine of the character described, the combination with a prime mover, acl counting elements adapted and'the cross: shaft 801 and held rearward condition. At its rear end the detent bar E finger e which confronts a stud 6 carbail is swung forward as tg its upper po'rv 95. 218, a'nd the key is pivotally mounted on the forward end of an arm G'pivoted upon the cross rod or shaft 200 for this purpose though it is located a little stead of at the middle right-hand portion of the character described,

devices fromthe detent means; of means for disablingthe releasing means, and control:

t be operated i530 &

thereby, manipulative amount-determining devices adapted when set to supply fixed stops for said accounting elements, detentaction of said member, and means for removing the interference in a predetermined number of operations of the prime mover.

3. In a machine of the character described, the combination with a motor-driven prime mover, a manipulative motor controller, manipulative amount-determining devices,

detent means therefor, and detent releasing means; of means for disabling the latter,

means .for detaining the motor-controller,

and controlling devices adapted to automatt cally reenab'le said releasing means and dis able the motor-controller detaining means.

mover, a manipulative motor-controller,

manipulative amount-determining devices, detent means therefor, and detent releasing means; of means for di ablmg the'latter,

means for detaining the motor-controller, and controlling devices adapted to automatically reenable said. releasing means the latter adapted in turn to disable the motor-controller detaining means.

the combination with a prime mover, man pulative amount-determining devices, detent meanstherefor, and detent releasing means including a member adapted to normallyreceivexfull reciprocation from the prime'mover; 0t means for limiting at will the extent of reciprocation of said member, and escapment devices operated by the latter in its limited'reciproca tion and adapted to disable thelimiting means in' a predetermined nuniber of operations of the prime mover.

6. In a machine of-thegharacter described, the combination .witha prime mover, ma-

nipulative amount-determining devices, detent means therefor, and detent. releasing means including a reciprocable member spring-actuated one way and impelled contra by said prime mover; a' movable abutment piece adapted when moved from normal to obstruct said reciprocable member and limit its movement; a spring-held member adapt-' edwhen moved from normal to cam saidj abutment piece into efiective position; and an escapement device engaging said spring held member, and adapted to detain it at difi'erent positions, said escapement device being actuated by said reciprocable member to effect its stepby step return to normal in successive operations of the prime. mover.

7. In a machine of the character described,"the combination with aprimemover,

manipulative amount-determining. devices,

detent means therefor, and 'detent releas- -said rocking member to effect its stepby step return to normal in successive opera-.

tions of the prime mover.

8. In a machine of the character described,

the combination with 'a prime mover, manipulatlve amount-determining devices, detent means therefor, and detent releasing meansincluding a rocking member spring- 4;. In a machine of theccharacter descrrbed, the combination with a motor-driven pr me actuated one Way and impelled contra by said prime mover; a movable abutment piece adapted when moved from normal to :obstruct said rocking member and limit its oscillation; a spring-held ratchetcd slide adapted when movedfrom normal to cam said abutment piece into efi ective position;

and an escapement pallet, composed of independently pivoted members spring-connected whereby one is normally engaged member being rotatively'engaged with the first and spring-drawn to disengage the same from the slide'but being normally rctractedby engagement with the aforesaid rocking member of the releasing and restoring means. I

9. In a machine of the character described, the combination with a prime mover, manipulative amountdetermining devices, detent means, and detent releasing means including a rocking member spring-actuated one way and impelled contra by said. prime mover; a movable abutment piece adapted when moved from normal to obstruct said rocking member and limits its oscillation; a spring-held slide adapted when moved from normal to cam said abutment piece into effective position and having a series of index shoulders; a slide-setting dog piv- -otallyand slidably mounted" for engagement with' one or another of said shoulders and for movement varying distances with the slide; and. an escapement device engaging said slide and adapted to detain it at difl'erent positions, said escapementdevice being actuated by said rocking member, to effect its step-by step return to normal in succes-- sive operations to the prime mover.

10. In a machine of the character described, the'. combination with a prime mover, manipulative amount-determining devices, detent means, and detent releasing means including 'a'rocking member springwith said ratcheted slide, the other pallet 5. In machine of the character described,

' actuated one Way and impelled contra by a said prime mover; amovable abutment piece adapted when moved from normal to obstruct said rocking member and limit its oscillation; a spring-held slide adapted when moved from normal to cam said abut- 'ment piece into effective position and having a series of index shoulders; a slide-setting dog pivotally and slidably mounted for engagement with one or another of said shoulders and for movement varying distances with the slide; a spring and connections for retracting said dog; and an escapement device engaging said slide and adapted 'ton'detainit at different positions, said escapement device being actuated by said rocking member to efiect its step by step return to normal in successive operat-ions of the prime mover.

11. In a inachine of the character described, the combination With a prime mover, manipulative amountdetermining devices, detent means therefor, and detent releasing means including a rocking member spring-actuated oneway and impelled contra by said prime mover; a motor for driving the prime mover; motorcontrolling means including a movable member having spring-actuated one way and impelled the other way by the prime mover; an abutment piece for obstructing spring movement of said second rocking member; a differentially adjustable spring-held member for setting said abutment piece; and escapement devices for effecting step by step return of said adjustable member under actuation by said second rocking member. H

CHAR-LES A; LUNDGREN. W'itnesses:

J. G. VINCENT, ARTHUR WV. FRENZEL. 

